Xcode custom shell scripts are slowing down the compiling time

I can't enlighten you but I can tell you how I stopped mine from running. This also happened after installing Cocoapods. In my main project's Target, under Build Phases, I noticed two entries entitled Check Pods Manifest.lock and another called Copy Pods Resources.

Under both there was an unchecked option Run script only when installing. I checked both and at least for now my projects build and run fine without running the scripts.

This is kind of a crappy answer because I can't really give you any more information, and it might not even work for your case, so hopefully someone comes along and enlightens us.

POSSIBLE EXTERNAL BUNDLE ISSUES

So I just had a frustrating experience debugging an issue where a pod installed library's NSLocalized strings file weren't working. Turns out it was because I checked the option mentioned above. Pods-resources.sh, which had the lines to install the bundle, wasn't running in debug mode. It was only running when installing - of course! Something to watch out for.

More info in this question:

NSLocalizedStringFromTable not working in CocoaPod dependency

To fix the slow "Copy pods resources" problem I figured out a solution to only copy the resources if they haven't been copied before.

For this purpose we have to patch the *-resources.sh files that are created by cocoapods such that the copy procedure only happens if a generated file in the target directory doesn't exist (it is created upon first copy). As long as this target directory exists and includes this autogenerated file, the copy resources phase is skipped. This saves me about 30 seconds in my project (of course depends on your project size). To accomplish this do the following:

Create a patch file called 'copy_pod_resources_once.patch' in your project root dir with the following contents:

5a6,13> NONCE_FILE="${TARGET_BUILD_DIR}/${UNLOCALIZED_RESOURCES_FOLDER_PATH}/copyresources-done.nonce"> if [ -f "$NONCE_FILE" ]; then>    echo "already copied resources">    exit 0> else>    touch "$NONCE_FILE"> fi> 

In the Podfile for your project add the following post install hook:

post_install do |installer_representation|    system('find "./Pods/Target Support Files" -name "*-resources.sh" | xargs -I{} patch -p0 {} -i ./copy_pod_resources_once.patch')    <other post install stuff>end

For me, it was Crashlytics. There were some outstanding changes, as Crashlytics does auto-updating of its files. I reset/removed them and rebuilt and got past it.

So the general answer may be to check any third party components and make sure they're working properly.